打
打 – Da3 – Hit, Make, Do
What happens when a 手 – Shou3 – Hand meets a 丁 – Ding1 – Nail? 打!
This word by itself just means “Hit” but is used in lots of expressions. You 打工 – Da3 Gong1 – Hit Work — Work, 打賭 – Da3 Du3 – Hit Gambling — Gamble, Bet, even 打電話 – Da3 Dian1 Hua1 – Hit Electric Speech — Make a phone call.